Question

    Find the sum of 1² + 3² + 5² +

    7²……………………………….23².
    A 2100 Correct Answer Incorrect Answer
    B 1600 Correct Answer Incorrect Answer
    C 2300 Correct Answer Incorrect Answer
    D 1800 Correct Answer Incorrect Answer

    Solution

    N = 23(last term) Sum of square of consecutive odd numbers = (n(n+1)(n+2))/6  ,where N= last term ⇒  (23(23+1)(23+2))/6  ⇒  (23 ×24 ×25)/6  ⇒  2300

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